UNICODE is the default setting on both msvc 2k3 and 2k5 (what means RegOpenKeyEx expands to RegOpenKeyExW).Explicitly switch to ANSI versions of WINAPI functions, e.g. RegOpenKeyEx->RegOpenKeyExA.

We use the approach with ANSI functions in kdesupport/kdewin32 too.It is safe to use ANSI functions as the args are already char*.Should be applied upstream, too.